/**
* Copyright 2013-2016 Guoqiang Chen, Shanghai, China. All rights reserved.
*
* Author: Guoqiang Chen
* Email: subchen@gmail.com
* WebURL: https://github.com/subchen
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jetbrick.util;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
public final class StringEscapeUtils {
public static String unescapeJava(String value) {
if (value == null || value.length() == 0) {
return value;
}
StringBuilder buf = null;
int len = value.length();
int len1 = len - 1;
for (int i = 0; i < len; i++) {
char ch = value.charAt(i);
if (ch == '\\' && i < len1) {
int j = i;
i++;
ch = value.charAt(i);
switch (ch) {
case '\\':
ch = '\\';
break;
case '\"':
ch = '\"';
break;
case '\'':
ch = '\'';
break;
case 't':
ch = '\t';
break;
case 'n':
ch = '\n';
break;
case 'r':
ch = '\r';
break;
case 'b':
ch = '\b';
break;
case 'f':
ch = '\f';
break;
case 'u':
ch = (char) Integer.parseInt(value.substring(i + 1, i + 5), 16);
i = i + 4;
break;
default:
j--;
}
if (buf == null) {
buf = new StringBuilder(len);
if (j > 0) {
buf.append(value.substring(0, j));
}
}
buf.append(ch);
} else if (buf != null) {
buf.append(ch);
}
}
if (buf != null) {
return buf.toString();
}
return value;
}
public static String escapeJava(String value) {
if (value == null || value.length() == 0) {
return value;
}
int len = value.length();
StringBuilder buf = null;
for (int i = 0; i < len; i++) {
char ch = value.charAt(i);
String rep;
switch (ch) {
case '\\':
rep = "\\\\";
break;
case '\"':
rep = "\\\"";
break;
case '\'':
rep = "\\\'";
break;
case '\t':
rep = "\\t";
break;
case '\n':
rep = "\\n";
break;
case '\r':
rep = "\\r";
break;
case '\b':
rep = "\\b";
break;
case '\f':
rep = "\\f";
break;
default:
rep = null;
break;
}
if (rep != null) {
if (buf == null) {
buf = new StringBuilder(len * 2);
if (i > 0) {
buf.append(value.substring(0, i));
}
}
buf.append(rep);
} else {
if (buf != null) {
buf.append(ch);
}
}
}
if (buf != null) {
return buf.toString();
}
return value;
}
public static String escapeJavaRegexPattern(String value) {
if (value == null || value.length() == 0) {
return value;
}
int len = value.length();
StringBuilder buf = null;
for (int i = 0; i < len; i++) {
char ch = value.charAt(i);
switch (ch) {
case '\\':
case '$':
case '^':
case '[':
case ']':
case '(':
case ')':
case '{':
case '}':
case '<':
case '>':
case '|':
case '+':
case '*':
case '?':
case '.':
if (buf == null) {
buf = new StringBuilder(len * 2);
if (i > 0) {
buf.append(value.substring(0, i));
}
}
buf.append('\\').append(ch);
break;
default:
if (buf != null) {
buf.append(ch);
}
}
}
if (buf != null) {
return buf.toString();
}
return value;
}
public static String unescapeXml(String value) {
if (value == null || value.length() == 0) {
return value;
}
StringBuilder buf = null;
int len = value.length();
int len3 = len - 3;
for (int i = 0; i < len; i++) {
char ch = value.charAt(i);
if (ch == '&' && i < len3) {
int j = i;
char ch1 = value.charAt(i + 1);
switch (ch1) {
case 'l':
if (value.charAt(i + 2) == 't' && value.charAt(i + 3) == ';') {
i += 3;
if (buf == null) {
buf = new StringBuilder(len3);
if (j > 0) {
buf.append(value.substring(0, j));
}
}
buf.append('<');
} else if (buf != null) {
buf.append('&');
}
break;
case 'g':
if (value.charAt(i + 2) == 't' && value.charAt(i + 3) == ';') {
i += 3;
if (buf == null) {
buf = new StringBuilder(len3);
if (j > 0) {
buf.append(value.substring(0, j));
}
}
buf.append('>');
} else if (buf != null) {
buf.append('&');
}
break;
case 'a':
int len4 = len - 4;
int len5 = len - 5;
if (i < len4 && value.charAt(i + 2) == 'm' && value.charAt(i + 3) == 'p' && value.charAt(i + 4) == ';') {
i += 4;
if (buf == null) {
buf = new StringBuilder(len4);
if (j > 0) {
buf.append(value.substring(0, j));
}
}
buf.append('&');
} else if (i < len5 && value.charAt(i + 2) == 'p' && value.charAt(i + 3) == 'o' && value.charAt(i + 4) == 's' && value.charAt(i + 5) == ';') {
i += 5;
if (buf == null) {
buf = new StringBuilder(len5);
if (j > 0) {
buf.append(value.substring(0, j));
}
}
buf.append('\'');
} else if (buf != null) {
buf.append('&');
}
break;
case 'q':
int len_5 = len - 5;
if (i < len_5 && value.charAt(i + 2) == 'u' && value.charAt(i + 3) == 'o' && value.charAt(i + 4) == 't' && value.charAt(i + 5) == ';') {
i += 5;
if (buf == null) {
buf = new StringBuilder(len_5);
if (j > 0) {
buf.append(value.substring(0, j));
}
}
buf.append('\"');
} else if (buf != null) {
buf.append('&');
}
break;
default:
if (buf != null) {
buf.append('&');
}
break;
}
} else if (buf != null) {
buf.append(ch);
}
}
if (buf != null) {
return buf.toString();
}
return value;
}
public static String escapeXml(String value) {
if (value == null || value.length() == 0) {
return value;
}
int len = value.length();
StringBuilder buf = null;
for (int i = 0; i < len; i++) {
char ch = value.charAt(i);
switch (ch) {
case '<':
if (buf == null) {
buf = new StringBuilder(len * 2);
if (i > 0) {
buf.append(value.substring(0, i));
}
}
buf.append("<");
break;
case '>':
if (buf == null) {
buf = new StringBuilder(len * 2);
if (i > 0) {
buf.append(value.substring(0, i));
}
}
buf.append(">");
break;
case '\"':
if (buf == null) {
buf = new StringBuilder(len * 2);
if (i > 0) {
buf.append(value.substring(0, i));
}
}
buf.append(""");
break;
case '\'':
if (buf == null) {
buf = new StringBuilder(len * 2);
if (i > 0) {
buf.append(value.substring(0, i));
}
}
buf.append("'");
break;
case '&':
if (buf == null) {
buf = new StringBuilder(len * 2);
if (i > 0) {
buf.append(value.substring(0, i));
}
}
buf.append("&");
break;
default:
if (buf != null) {
buf.append(ch);
}
break;
}
}
if (buf != null) {
return buf.toString();
}
return value;
}
public static String escapeJavaScript(String value) {
return escapeJava(value);
}
public static String unescapeJavaScript(String value) {
return unescapeJava(value);
}
public static String escapeUrl(String value) {
return escapeUrl(value, "UTF-8");
}
public static String escapeUrl(String value, String encoding) {
try {
return value == null ? null : URLEncoder.encode(value, encoding);
} catch (UnsupportedEncodingException e) {
return value;
}
}
public static String unescapeUrl(String value) {
return unescapeUrl(value, "UTF-8");
}
public static String unescapeUrl(String value, String encoding) {
try {
return value == null ? null : URLDecoder.decode(value, encoding);
} catch (UnsupportedEncodingException e) {
return value;
}
}
}